Summary&colon;------------It is important equipment to set up CATV HFC networks&comma; and primarily used for TV video signal&comma; digital TV signal&comma; telephone voice signal and data &lpar;or compressed data&rpar; signal long-distance fiber transmission&period; The product use import high performance DFB laser transmitter as light source&comma; RF drive adopts RF power digital automatic process technique and advanced RF pre-distortion circuit developed by our company and built-in perfect microprocessor automatic monitor system insure the excellent function of the product&period;

Charactristics&colon;----------------------Dual Module RF drive&comma; high efficiency laser pre-distortion adjustment2&period; Full-automatically Optic Modulation Intensity &lpar;OMI&rpar; l&comma; AGC&MGC control&period;AGC status&comma; input range is 78dBuV~88dBuV&comma; system index is the bestMGC status&comma; input range can be adjusted 75dBuV~90dBuV by the ATT on front panel3&period; Front panel has 20 grade OMI status display&lpar;Modulation Depth&rpar;&period;&comma; intuitively adjust and display OMI normal &lpar;NOM&rpar;&comma; low&lpar; LOW&rpar; or high&lpar;HIGH&rpar;AGC status&comma; RF is fixed&comma; OMI is always at NOM status&period;MGC status&comma; OMI can be at NOM status by adjusting ATT&period;4&period; Dual power supply inside backup&period; Full-automatically switchOne is working&comma; the other as cool backup&lpar; suggested&rpar;Both are working at the same time&comma; one as hot backup&comma; If one is damaged&comma; switch to the other full- automatically&period; Switch time ≤ 10us&period;5&period; Full- automatically control of casing temperature&comma; ensure long life of the laserCasing temperature is monitored and controlled by micro-processor&period; Display screen shows the actual operation temperature in timeWhen casing temperature≥ 45&comma; Two fans at the back panel will open automatically to cool it by constraintWhen casing temperature≤ 35&comma; the transmitter will turn down automatically to ensure longer life of the fans&period;6&period; Dual RF input portAM interface input 59 routes PAL-D&lpar;47-550MHz&rpar;Digital interface&lpar;-10dB&rpar; input digital video&lpar;550-750MHz&rpar;7&period; Time locked functionSFT8300B&comma; with time control and lock function&comma; user can set the working time &lpar; eg&comma; 3 months &rpar; by the software on the front panel&period; If exceeding the fixed time&comma; there will be alarm&comma; only the password can turn on the machine again otherwise it will turn off automatically

Test Condition&colon;-----------------------------

Test link path is formed of standard fiber and standard optical receiver&period; Under the condition of prescriptive link loss&comma; laser transmitter modulation depth of each channel being 3&period;6&percnt;&comma; set 59 PAL-D simulative TV channels signal at 47~550MHz and 33 QAM64 digital modulated signal at the range of 550~750&lpar;862&rpar; MHz&comma; output level of digital modulated signal is lower 6dB than of simulative signal carrier wave&period;